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Micro thermal management of high-power diode laser bars

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11 Author(s)
Lorenzen, Dirk ; Jenoptik Laserdiode GmbH, Jena, Germany ; Bonhaus, J. ; Fahrner, W.R. ; Kaulfersch, E.
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Lifetime and reliability of high-power diode laser bars are sensitively related to operating temperature, mounting stress, and solder electromigration. These three factors have been taken into account for the development of a new packaging technology for 1 cm laser bars of gallium arsenide. We examine the use of chemical-vapor-deposited (CVD) diamond as heatspreaders in order to reduce thermal resistance of a microchannel cooler for liquid cooling. We show that it is possible to perform hard soldering on a CVD-diamond with a new technique. Additionally, we present a controlled water cooling system fit to the flow characteristics of the cooler. It permits one to adjust the emission wavelength of the diode lasers by changing the water flux

Published in:

Industrial Electronics, IEEE Transactions on  (Volume:48 ,  Issue: 2 )

Date of Publication:

Apr 2001

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